simple question
01-28-2005, 01:22 PM
#1
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simple question 347 aluminum block w/ 600rwhp vs 360 iron block w/600rwhp, both heads/cam spray cars ... everything else being equal as far as tranny, rear-end, tires, suspension except weight where the 360 will weigh 65-110lbs more in the front dependin on who you ask. which motor will win?
01-28-2005, 01:34 PM
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btw, the reason for this question is that i hear that 500rwhp 408 will blow away a 500rwhp 347 but i was wonderin if the displacement difference isn't as much will it still be the same result?
01-28-2005, 01:35 PM
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Originally Posted by jrp
agreed, the extra 13 cube arent enough to overcome the weight difference. again asumming all is equal.
01-28-2005, 01:38 PM
#6
Originally Posted by madpwr1
btw, the reason for this question is that i hear that 500rwhp 408 will blow away a 500rwhp 347 but i was wonderin if the displacement difference isn't as much will it still be the same result?
The 408 would be more streetable and make more power under the curve, but it doesn't mean its going to go faster than the 346 that's just IMHO. However it should make more average power throughout the 2500-7500 area.
01-28-2005, 01:42 PM
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Originally Posted by MUSTANGEATER
That's not always true, its average power to weight ratio throughout your powerband. Not to mention traction, and the other things of course.
The 408 would be more streetable and make more power under the curve, but it doesn't mean its going to go faster than the 346 that's just IMHO. However it should make more average power throughout the 2500-7500 area.
The 408 would be more streetable and make more power under the curve, but it doesn't mean its going to go faster than the 346 that's just IMHO. However it should make more average power throughout the 2500-7500 area.
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01-28-2005, 01:56 PM
#8
Thats the real question... Is there enough "power under the curve" on the 360 to make up for the weight difference. Even if they peak at the same horsepower at the same rpm, the bigger cubes should be making more power than the 347 everywhere before peak. Now if we follow the 100 Lbs = 10 HP rule of thumb, I would think that if the 360 is making 10 - 15 more HP everywhere before peak, the weight disadvantage should be nullified. In any case, i think its a driver's race. I know Id have my hands full piloting a 600 HP spray car. 
01-28-2005, 02:08 PM
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Originally Posted by GuitsBoy
Thats the real question... Is there enough "power under the curve" on the 360 to make up for the weight difference. Even if they peak at the same horsepower at the same rpm, the bigger cubes should be making more power than the 347 everywhere before peak. Now if we follow the 100 Lbs = 10 HP rule of thumb
Last edited by madpwr1; 01-28-2005 at 02:35 PM.
01-28-2005, 02:14 PM
#10
Originally Posted by madpwr1
now the 100lbs is on the front of the car, you think you can follow that same rule of thumb as if the wieght was distributed throughout the car? and yes that is the real question ... let's add drivers are equal too so that doesn't come up again either
01-28-2005, 02:31 PM
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Originally Posted by GuitsBoy
I always thought that weight off the front of the car only helps when traction is an issue. eliminating weight from the front is useful because the front lifts and plants more weight on the rear wheels. If traction is not an issue, as from a roll, i dont think it matters. I could be dead wrong though.
and anyone know or can make a good guess based on previous experience how much more "under the curve" power the 360 will make over the 347?
